Code Beautifier
Paste messy JSON, HTML, CSS, or JavaScript and get clean, indented output instantly.
Free, no sign-upUpdated
Use the tool
Language:
Input
Output
Formatted output will appear here…Supported formats
- JSON: validates and formats with configurable indentation
- HTML: rebuilds tag hierarchy with consistent indentation
- CSS: formats selectors, properties, and values with consistent spacing
- JavaScript: reformats code with standard indentation rules
Runs entirely in your browser
All formatting happens client-side. Nothing is sent to a server. That matters when you're working with internal code, API keys, client configs, or anything you'd rather not paste into a third-party service.
When you actually need this
- Minified third-party scripts you need to read in a code review
- Schema markup generated by a CMS plugin that outputs single-line JSON-LD
- CSS inherited from a legacy stylesheet with no consistent formatting
- API responses returned as a single-line JSON string
- Any code that arrived as a wall of text and needs to be human-readable
How to use it
- Select the format (JSON, HTML, CSS, or JavaScript)
- Paste your code into the input panel
- The formatted output appears instantly in the right panel
- Copy with one click
Related tools: schema markup generator and schema markup validator.